Product details:

63134301115, Fein Slugger 1-3/16" X 4" ID Sharpened Annular Cutter ID-style cutters are convenient when drilling through multiple layers. Features: Sizes available with the ability to cut 7/16 of an Inch up to 3-Inches with 4-Inch depth Suitable for aluminum and other non-ferrous metals Specifications: Cutter Diameter: 1-3/16" Cutting Depth: 4" Shank Diameter: 3/4" Coated in Titanium Carbonitride 3/4 in. Weldon shank allows cutter to be with other competitive magnetic drills